My Inquiry
My Account
onsemi MC74HCT20ADTR2G
- Part No.:
- MC74HCT20ADTR2G
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC74HCT20ADTR2G.pdf
- Description:
- IC GATE NAND 2CH 4-INP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,357
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC74HCT20ADTR2G from onsemi is a dual 4-input NAND gate IC with LSTTL-compatible inputs, operating at 4.5 V to 5.5 V supply voltage. It delivers 10 LSTTL load drive capability, features low input current (±0.1 µA), and supports industrial temperature range (–55 °C to +125 °C) in TSSOP-14 package. It is used in digital logic control subsystems requiring noise-immune, TTL-interfaced combinational logic.
For engineers reviewing the MC74HCT20ADTR2G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed VOH ≥ 4.4 V at 4.5 V supply, VOL ≤ 0.1 V under 20 µA load, propagation delay ≤ 42 ns at 125 °C, and Pb-free TSSOP-14 packaging for space-constrained PCB layouts.
Technical Context
The MC74HCT20ADTR2G implements two independent 4-input NAND gates using high-performance silicon-gate CMOS technology. Its inputs are designed to interface directly with standard LSTTL outputs, and its outputs drive CMOS, NMOS, and TTL loads without level-shifting circuitry.
It operates within strict DC supply limits (−0.5 V to +7.0 V) and input/output voltage ranges (−0.5 V to VCC + 0.5 V), with maximum input leakage current of ±1.0 µA at 125 °C and quiescent supply current up to 40 µA per package - enabling stable operation in battery-backed or thermally demanding environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Dual 4-input NAND gate - provides two independent Boolean NOT-AND operations per device |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL/LSTTL systems and tolerance to rail variation |
| Propagation Delay | Max 42 ns at 125 °C (CL = 50 pF) - defines worst-case timing margin for synchronous logic design |
| Output Drive | 10 LSTTL loads - enables direct fanout to legacy TTL circuits without buffer stages |
| Input Leakage Current | ±1.0 µA max at 125 °C - minimizes unintended current paths in high-impedance or low-power states |
| Operating Temperature | –55 °C to +125 °C - supports deployment in automotive under-hood, industrial motor control, and aerospace avionics |
| Package | TSSOP-14 (Case 948G) - surface-mount, 5.0 mm × 4.4 mm footprint with 0.65 mm pitch for high-density routing |
Pinout & Package
TSSOP-14 package (Case 948G), 5.0 mm × 4.4 mm body, 0.65 mm lead pitch, Pb-free, moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | A1 | First NAND gate input A - active-high logic input; must be tied to VCC or GND if unused |
| 2 | B1 | First NAND gate input B - active-high logic input; shares same electrical characteristics as A1 |
| 3 | NC | No connection - internal die bond wire not attached; must remain unconnected on PCB |
| 4 | C1 | First NAND gate input C - active-high logic input; electrically identical to A1/B1 |
| 5 | D1 | First NAND gate input D - active-high logic input; completes 4-input NAND function for Y1 |
| 6 | Y1 | First NAND gate output - open-drain compatible only when externally pulled; logic low = ≤0.1 V @ 20 µA |
| 7 | GND | Ground reference - all voltage measurements referenced to this pin; requires low-impedance PCB plane |
| 8 | Y2 | Second NAND gate output - complements inputs A2–D2; same VOH/VOL specs as Y1 |
| 9 | A2 | Second NAND gate input A - electrically isolated from first gate; identical VIH/VIL thresholds |
| 10 | B2 | Second NAND gate input B - supports independent logic evaluation alongside first gate |
| 11 | NC | No connection - internal die bond wire not attached; must remain unconnected on PCB |
| 12 | C2 | Second NAND gate input C - completes 4-input set for second gate; same AC/DC specs as C1 |
| 13 | D2 | Second NAND gate input D - final input for Y2; VIH ≥ 2.0 V guarantees recognition as logic high |
| 14 | VCC | Positive supply - powers both gates; decoupling capacitor (0.1 µF) required within 5 mm |
Key Features
| Feature | Design Value |
|---|---|
| LSTTL-compatible inputs | VIH = 2.0 V min and VIL = 0.8 V max ensure reliable interfacing with legacy 74LS-series outputs without level shifters |
| High noise immunity | CMOS input structure provides >1.2 V noise margin at 5 V supply, reducing susceptibility to EMI in industrial settings |
| Pb-free TSSOP-14 package | RoHS-compliant, MSL1 rating enables reflow soldering without baking; footprint matches SOIC-14 pin count but saves 45% board area |
| Low static power consumption | ICC ≤ 40 µA at 125 °C allows use in always-on monitoring circuits without thermal derating |
| Wide temperature operation | Specified performance across –55 °C to +125 °C supports deployment in engine control units and outdoor telecom equipment |
Applications
| Industrial PLC Logic Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Discrete sensor signal conditioning and interlock validation in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Dual NAND gate performs real-time AND-NOT logic for safety-critical enable/disable decisions before actuator activation. Use Value: Guaranteed 42 ns max propagation delay at 125 °C ensures deterministic response within PLC scan cycle timing budgets. | Use Scenario: Door lock status arbitration and headlight dimming control logic in centralized body electronics modules. IC Role / Device Role / Timing Role: Implements combinatorial logic for multi-sensor fusion (e.g., door ajar + ignition state → lock enable). Use Value: LSTTL-compatible inputs accept direct signals from legacy door switch sensors without external pull-ups or buffers. |
| Medical Diagnostic Equipment | Avionics Power Sequencing |
Use Scenario: Power-up sequence validation and fault flag consolidation in portable ultrasound and ECG monitor mainboards. IC Role / Device Role / Timing Role: NAND gates verify concurrent readiness of analog front-end, ADC, and display subsystems before system boot. Use Value: ±0.1 µA input leakage at 25 °C prevents false triggering in low-current standby modes critical for battery life. | Use Scenario: Redundant power rail enable logic in flight control computer power management units. IC Role / Device Role / Timing Role: Performs voting logic across three independent voltage monitors to assert safe power-on reset. Use Value: Operation down to –55 °C ensures functionality during cold-soak ground testing and high-altitude cruise conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4-input NAND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT20DR | SOIC-14 package (Case 751A); 8.75 mm × 3.91 mm vs. TSSOP-14's 5.0 mm × 4.4 mm; identical electrical specs | Preferred where manual rework or through-hole prototyping is required; unsuitable for fine-pitch automated assembly | Select SN74HCT20DR when board space permits larger footprint and hand-soldering is part of production flow |
| 74VHC20M | Wider supply range (2.0 V to 5.5 V); higher speed (tPD = 7.5 ns typ at 5 V); not LSTTL-input compatible (VIH = 3.5 V min) | Requires level-shifting for legacy TTL interfaces; better suited for mixed-voltage 3.3 V/5 V systems with speed-critical paths | Choose 74VHC20M only when migrating from 5 V-only designs to dual-supply architectures and VIH compatibility is verified |
Compared with SN74HCT20DR and 74VHC20M, the MC74HCT20ADTR2G uniquely balances LSTTL interoperability, industrial temperature range, and compact TSSOP packaging - making it optimal for new 5 V logic designs targeting high-reliability embedded systems with space constraints.
Availability
MC74HCT20ADTR2G is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical diagnostics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MC74HCT20ADTR2G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon-based solutions for automotive, industrial, cloud, and IoT applications.
The MC74HCT20ADTR2G belongs to the HCT logic family, engineered for seamless migration from bipolar TTL to CMOS while preserving pinout and voltage-level compatibility - specifically targeting legacy system upgrades and ruggedized control logic.
FAQ
What is the maximum propagation delay of the MC74HCT20ADTR2G at full temperature range?
The MC74HCT20ADTR2G has a maximum propagation delay of 42 ns at VCC = 4.5 V, CL = 50 pF, and TA = +125 °C, measured from any input (A, B, C, or D) to corresponding output (Y1 or Y2). This value is guaranteed across the full industrial temperature range and forms the basis for worst-case timing analysis in synchronous logic designs.
Does the MC74HCT20ADTR2G require external pull-up resistors on its inputs?
No, the MC74HCT20ADTR2G does not require external pull-up resistors on its inputs because it features CMOS input structure with defined VIH (≥2.0 V) and VIL (≤0.8 V) thresholds. However, unused inputs must be actively tied to VCC or GND - floating inputs are prohibited and may cause excessive ICC or oscillation. The MC74HCT20ADTR2G datasheet explicitly mandates this practice.
Can the MC74HCT20ADTR2G drive standard TTL loads directly?
Yes, the MC74HCT20ADTR2G is rated to drive up to 10 LSTTL loads directly, confirmed by its output drive specification (IOH ≥ –4.0 mA, IOL ≥ 4.0 mA at VCC = 4.5 V). Its VOH ≥ 4.4 V and VOL ≤ 0.1 V at 4.0 mA meet LSTTL interface requirements, eliminating need for buffer stages when interfacing with 74LS-series devices.
What is the meaning of "NC" pins on the MC74HCT20ADTR2G pinout?
Pins 3 and 11 of the MC74HCT20ADTR2G are marked "NC" (No Connection), indicating they have no internal bond wire or functional connection to the silicon die. These pins must remain unconnected on the PCB - soldering or routing to them may cause mechanical stress or unintended coupling. The MC74HCT20ADTR2G datasheet confirms these terminals are not internally used and carry no electrical function.
Is the MC74HCT20ADTR2G suitable for automotive under-hood applications?
Yes, the MC74HCT20ADTR2G is suitable for automotive under-hood applications due to its specified operating temperature range of –55 °C to +125 °C and qualification to AEC-Q100 stress test standards (as documented in onsemi's automotive-grade HCT family compliance reports). Its Pb-free TSSOP-14 package also meets JEDEC J-STD-020 reflow requirements for under-hood thermal cycling.
MC74HCT20ADTR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HCT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- NAND Gate
- Number of Circuits:
- 2
- Number of Inputs:
- 4
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 10 µA
- Current - Output High, Low:
- 4mA, 4mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 42ns @ 5V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MC74HCT20ADTR2G FAQ
1.How can I place an order for MC74HCT20ADTR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HCT20ADTR2G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC74HCT20ADTR2G reliable?
The price and inventory of MC74HCT20ADTR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HCT20ADTR2G is usually 5 days.
3.What payment methods are accepted for MC74HCT20ADTR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HCT20ADTR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HCT20ADTR2G?
MC74HCT20ADTR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HCT20ADTR2G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC74HCT20ADTR2G?
For technical support, including MC74HCT20ADTR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HCT20ADTR2G requirements.
6.How does Aetrix verify that MC74HCT20ADTR2G is sourced from the original manufacturer or authorized distributors?
All MC74HCT20ADTR2G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC74HCT20ADTR2G meets industry standards.
7.What is the process for return or replacement of MC74HCT20ADTR2G?
All MC74HCT20ADTR2G units undergo pre-shipment inspection (PSI). If there is an issue with MC74HCT20ADTR2G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC74HCT20ADTR2G part is unused and in its original packaging.
Return procedure for MC74HCT20ADTR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC74HCT20ADTR2G Tags
-
SN74LVC1G14DBVR
Texas Instruments
-
SN74LVC1G14DCKR
Texas Instruments
-
SN74AHC1G14DBVR
Texas Instruments
-
SN74LVC1G08DBVR
Texas Instruments
-
SN74LVC1G08DCKR
Texas Instruments
-
SN74LVC1G32DCKR
Texas Instruments
-
SN74LVC1G04DBVR
Texas Instruments
.jpg)
-
74LVC1G08GW,125
Nexperia USA Inc.
-
SN74LVC1G04DCKR
Texas Instruments
-
SN74AHC1G08DBVR
Texas Instruments
-
SN74LVC1G32DBVR
Texas Instruments
-
SN74AHCT1G08DBVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
